Objectives The aim of this study was to compare microradiography ( MR ) and microcomputed tomography (μ CT ) analysis of bone samples following maxillary sinus augmentation at different time periods and determine the relationships between measured area and volume fractions. Materials and methods Lateral window sinus grafts were performed on 10 patients using a mineralized human bone allograft ( MHBA ). At implant placement, 5–13 months after surgery, 10 bone core biopsies were harvested. Prior to histologic sectioning, bone samples were evaluated with μ CT . The morphometric parameters computed by MR and μ CT were compared using Pearson's correlation and Bland and Altman analysis and included hard tissue fraction ( HV / TV :%), soft tissue fraction ( SV / TV :%), vital bone fraction ( BV / TV :%) and residual graft fraction ( GV / TV :%). Results Strong positive correlation between MR and μ CT was found for HV / TV and SV / TV and BV / TV [ r = 0.84, 0.84 and 0.69, respectively] but weak for GV / TV [ r = 0.10]. Conclusion μ CT technology shows promising potential as an indicator of bone morphology changes; however, caution should be used in interpreting morphometric parameters, as the different methods reveal important biases.
Peer Reviewed
http://deepblue.lib.umich.edu/bitstream/2027.42/108620/1/clr12225.pdf